Abstract:
A screen house experiment was conducted during 1996 short rains to assess carry-over effects of mother plant-applied
nitrogen and potassium on seedling emergence, seedling vigour and dry matter accum~lation of Solanum potato
seedlings from true potato seed (TPS). Hybrid TPS was obtained from a cross between CIP 381379 (Kisoro) and
Rutuku. Kisoro mother plants received N rates of 0, 120 and 240 kg ha·1
, and potassium rates of 0, 132.8 and 265.6
kg ha·t. Performance of seed lots from the different fertiliser treatment combinations was compared to that of ·
imported hybrid progenies, lP 88001, IP 88006 and KP 90178,8 obtained from mother plants supplied with 500 kg
DAP ha·
1
• Mother plants supplied with 120 and J 32.8 kg Nand K, respectively, produced true seed with high seedling
emergence and vigour (sowing value), comparable to that ofimported hybrid TPS.